The Hollywood Reporter spilled the beans this morning, so now we can say what we’ve known about for more than a year — that Alex Gibney, perhaps the best documentary filmmaker in the business, is finishing up a movie for HBO about Scientology, and he’s hoping to get it into the Sundance film festival in January.

Your proprietor sat down for a two-hour on-camera interview with Gibney earlier this year, and we’ll be interested to see if any of it makes the final cut.

Gibney’s project started out as a documentary based on Lawrence Wright’s 2013 book, Going Clear: Scientology, Hollywood, & the Prison of Belief — Gibney had previously based an HBO film on another of Wright’s books, The Looming Tower, about al Qaeda.

But it was clear from our interview with Gibney and the many follow-up questions with his researchers that Gibney’s film will take in many of the more recent developments in Scientology which Wright’s book didn’t cover. We expect it to be a blockbuster film, and it should be a serious problem for the church. .